Constraining neutrino physics with BBN and CMBR
Constraining neutrino physics with BBN and CMBR
复制标题
用 BBN 和 CMBR 约束中微子物理
DOI:
10.1103/physrevd.65.023511
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
O. Pisanti
中科院分区:
文献类型:
--
作者:
S. Hansen;G. Mangano;A. Melchiorri;G. Miele;O. Pisanti
We perform a likelihood analysis of the recent results on the anisotropy of Cosmic Microwave Background Radiation from the BOOMERanG and DASI experiments to show that they single out an effective number of neutrinos in good agreement with standard Big Bang Nucleosynthesis. We also consider degenerate Big Bang Nucleosynthesis to provide new bounds on effective relativistic degrees of freedom N ν and, in particular, on neutrino chemical potential ξ α . When including Supernova Ia data we find, at 2 σ , N ν ≤ 7 and − 0 . 01 ≤ ξ e ≤ 0 . 22, | ξ µ,τ | ≤ 2 . 6.